Synthesis and optical properties of Er3+ and Eu3+ doped SrAl2O4 phosphor ceramic

Synthesis of phosphorescent ceramic pigment BaAl1.7B0.3O4 doped with Eu2+ and Dy3+

“…This emission range for Eu and Dy was also observed by Marchal et al [3]. According to Sánchez-Benítez et al [16] and Ayvacikli et al [17], the peak at 465 cm À 1 (see Fig. 4) is due to the molecular vibrations of octahedral units of the compound (Al(Eu)-O 6 ).…”

“…The peaks at 150 and 600 cm À 1 may represent low and high vibration frequencies, respectively, related to the connection of Al-O tetrahedral units [17]. From the curve representing the formulation Ba 0.97 Eu 0.02 Dy 0.01 Al 1.7 B 0.3 O 4 , it is also possible to infer that these peaks are more intense because Eu concentration is two times higher in this formulation.…”

The synthesis and afterglow luminescence properties of a novel red afterglow phosphor: SnO2:Sm3+,Zr4+

“…In this work, we firstly observe the intense red afterglow luminescence by co-doping Zr 4þ in SnO 2 :Sm 3þ . The Zr 4þ plays very important role on the occurrence of afterglow luminescence like the Dy 3þ in famous SrAl 2 O 4 :Eu 2þ ,Dy 3þ afterglow phosphor [8,9]. According to the results, we give a feasible interpretation for our observation and the important role of Zr 4þ on the afterglow luminescence of SnO 2 :Sm 3þ ,Zr 4þ is investigated in detail.…”

Structural and luminescent properties of Eu2+ and Nd3+-doped mixed alkaline earth aluminates prepared by the sol-gel method

“…They are most often prepared by solid state reactions, with long reaction times and at high annealing temperatures up to 1600 °C. 2,[4][5][6][7][8] In addition, some wetchemical techniques have been used to prepare the precursor mixture. Among others, the alkoxy sol-gel route [9][10][11][12] and the aqueous sol-gel route were used, [13][14][15][16] with citric or nitric acid as the peptizing agent.…”

“…[6][7][8]17,18,[20][21][22][23][24][25][26] Recently, we studied alkaline earth aluminates with the overall nominal compositions Ca 0. 5 , Eu 3+ and Nd 3+ ions and heating at 80 °C for 4 hours. The xerogel was obtained by heating the sol in a Petri dish at 80 °C.…”